42
English / USA
MS 440, MS 440 W, MS 440 C
Dirty air filters reduce engine power,
increase fuel consumption and make
starting more difficult.
If there is a noticeable loss of engine
power:
: Knock out the standard filter* (1) or
fleece filter* (2) (outer half of filter)
or fabric filter* (3) (outer half of filter)
and inner half of filter* (4) on the
palm of your hand or blow out with
compressed air.
In case of stubborn dirt or sticky
filter fabric:
: Wash the filter in a clean, non-
flammable solution (e.g. warm
soapy water) and then dry. Do not
expose to high temperatures.
: Do not impregnate filter with oil.
: Always replace a damaged filter.
: Reinstall the air filter.
* see "Guide to Using this Manual"
If there is a noticeable loss of engine
power:
: Clean the felt prefilter (1).
After cleaning the prefilter several times:
: Separate the filter components.
: Knock the HD filter (2) out on the
palm of your hand and blow it out
with compressed air from the inside
outward.
In case of stubborn dirt or sticky filter
fabric:
: Wash filter with STIHL universal
cleaner or in a fresh, non-flammable
solution (e.g. warm soapy water).
: Rinse the filter, from the inside
outward, under a low-pressure
water jet – do not use a high-
pressure washer.
: Dry all parts of the filter. Do not
expose to high temperatures.
Cleaning HD Filter
2
1
176BA005 KN
176BA006 KN
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